Scale-cabinet.



H. HOLZ.

SCALE CABINET.

APPLICATI'ON FILED JUNE 26, 1914.

' COLUMBIA PLANOORAPH C0,,WASHINGTON, u. c.

Patented A11 31, 1915.

UNITED STATES PATENT OFFICE.

HERMANN HOLZ, OE PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO SCIENTIFICMATERIALS COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OFPENNSYLVANIA.

SCALE-CABINET.

Patented Aug. 31, 1915.

Application filed June 26, 1914. Serial No. 847,421.

To all whom it may concern Be it known that I, HERMANN How, a subject ofthe Emperor of Germany, residing at Pittsburgh, in the State of Pennsyl-Vania, United States of America, have invented certain new and usefulImprovements in Scale-Cabinets, of which the following is aspecification.

My invention relates to the manipulation of delicate scientificinstruments, such as scales or balances, its special object being toprovide a transparent cabinet or case having doors so placed that moreready access may be had to the instrument by the operator with bothhands, while protection is afforded against the derangement of theinstrument by his breath.

The drawing shows a perspective view of my scale case with a balancetherein, and the doors in partially open position.

In scientific laboratories the balances used are of such delicacy thatthey must be protected from dust, accidental jarring, currents of air,and the operators breath, which would otherwise interfere with theirdelicate adjustment. While it is customary to place these instruments incases having a transparent door; the articles to be weighed and theweights are generally placed in the scale pans through a front glassdoor and then the door is closed to shut off currents of air. Thedifficulty with such a cabinet arises from the necessity of insertingthe hands through the door to change the amount of material beingmeasured or the weights, or to adjust some part of the instrument; theoperator is necessarily directly in front of the instrument and not onlyis his breath blown upon it, but his hands are inserted in awkwardposition, obscuring the graduated scale, creating currents, and oftenknocking the case.

My cabinet rests on suitable legs 1, 2, 3, having any suitable levelingmeans 4:; and its bottom 5 carries the column 6 of the balance. The sideand back walls may be of any desirable material, preferably glass. Infront the case is closed by the main sliding door 7 which movesvertically in slots provided therefor in the posts 8 and 9. Arranged oneach side of this main door, and

sliding vertically in grooves provided therefor are two auxiliarydiagonal doors 10 and 11. It will be observed that the doors 10 and 11are set diagonally so that an operator who is reading the scale of thebalance through the main door 7 can readily reach the balance throughthe main door 7 can readily reach the balance pans 12, 13, with bothleft and right hands and arms in natural position, through the doors 10and 11, respectively. By use of this construction, an operator mayobserve the reading of the scale 14: from a very short distance withoutany interference by his proximity, and without any danger of the balancebeing disturbed by his breath, while at the same time, and, withoutchanging his position, he may open either of the doors 10 and 11, andchange the weights or change the quantity of material being weighedwithout reaching, or knocking the case, or any danger of his breathaffecting the instrument or the material being weighed. No instrumentcases having these functions have heretofore been designed. Theadvantages of my construction will be apparent to those familiar withthis art.

Having thus described my invention and its use, I claim:

1. A cabinet for scale balances comprising a normally closed casing,means for operating the scale from the outside, said casing having atransparent side in front of the scale and at each'side of said front adiagonally placed door whereby the operator may reach the scale panswith hands in natural position without moving his body, substantially asdescribed.

2. 'A case for containing a scale balance, comprising a transparentvertically sliding main front door, and two sliding side doors arrangeddiagonally in position to give access for the operators hands at eachend of the case, in natural position and without moving his body, whilethe front remains closed, substantially as described.

3. A cabinet adapted for mounting a pair of scale balances having panson diagonally arranged hanger rods, comprising a case having avertically sliding transparent front door and on each side thereof adiagonally placed vertically sliding door, substantially signed my namein the presence of the two paallefl Erith tlhe positioln fog the hangersubscribed Witnesses. r0 s o t e sca e pans, w ere y to convenientlyreach said scale pans in the casing di- HERMANN HOLZ' 5 rectly andWithout the observer moving his Witnesses:

body. A. W. MER'rz, In testimony whereof I have hereunto HARRY POOL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

